ahci: implement ata_save/restore_initial_config()

[powerpc.git] / drivers / ata / libata-acpi.c

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index d14a48e..03a0acf 100644 (file)
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -34,6 +34,13 @@ struct taskfile_array {
        u8      tfa[REGS_PER_GTF];      /* regs. 0x1f1 - 0x1f7 */
 };
 
+/*
+ *     Helper - belongs in the PCI layer somewhere eventually
+ */
+static int is_pci_dev(struct device *dev)
+{
+       return (dev->bus == &pci_bus_type);
+}
 
 /**
  * sata_get_dev_handle - finds acpi_handle and PCI device.function
@@ -53,6 +60,9 @@ static int sata_get_dev_handle(struct device *dev, acpi_handle *handle,
        struct pci_dev  *pci_dev;
        acpi_integer    addr;
 
+       if (!is_pci_dev(dev))
+               return -ENODEV;
+
        pci_dev = to_pci_dev(dev);      /* NOTE: PCI-specific */
        /* Please refer to the ACPI spec for the syntax of _ADR. */
        addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
@@ -84,7 +94,12 @@ static int pata_get_dev_handle(struct device *dev, acpi_handle *handle,
        acpi_status status;
        struct acpi_device_info *dinfo = NULL;
        int ret = -ENODEV;
-       struct pci_dev *pdev = to_pci_dev(dev);
+       struct pci_dev *pdev;
+
+       if (!is_pci_dev(dev))
+               return -ENODEV;
+
+       pdev = to_pci_dev(dev);
 
        bus = pdev->bus->number;
        devnum = PCI_SLOT(pdev->devfn);
@@ -290,7 +305,7 @@ static int do_drive_get_GTF(struct ata_port *ap, int ix,
        *gtf_address = 0UL;
        *obj_loc = 0UL;
 
-       if (noacpi)
+       if (libata_noacpi)
                return 0;
 
        if (ata_msg_probe(ap))
@@ -516,7 +531,7 @@ static int do_drive_set_taskfiles(struct ata_port *ap,
                ata_dev_printk(atadev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
                               __FUNCTION__, ap->port_no);
 
-       if (noacpi || !(ap->cbl == ATA_CBL_SATA))
+       if (libata_noacpi || !(ap->cbl == ATA_CBL_SATA))
                return 0;
 
        if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED))
@@ -559,7 +574,14 @@ int ata_acpi_exec_tfs(struct ata_port *ap)
        unsigned long   gtf_address;
        unsigned long   obj_loc;
 
-       if (noacpi)
+       if (libata_noacpi)
+               return 0;
+       /*
+        * TBD - implement PATA support.  For now,
+        * we should not run GTF on PATA devices since some
+        * PATA require execution of GTM/STM before GTF.
+        */
+       if (!(ap->cbl == ATA_CBL_SATA))
                return 0;
 
        for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
@@ -614,7 +636,7 @@ int ata_acpi_push_id(struct ata_port *ap, unsigned int ix)
        struct acpi_object_list         input;
        union acpi_object               in_params[1];
 
-       if (noacpi)
+       if (libata_noacpi)
                return 0;
 
        if (ata_msg_probe(ap))